Baffle structure for combustion tube type burners



C- 9, 1951 J. J. coNRoN 2,570,771

BAFFLE STRUCTURE FOR COMBUSTION TUBE- TYPE BURNERS Filed Feb. 24, 1949INVENTOR.

JOHN ..CONRON7 kfw/WM .1 'I'TOR XE Y v This invention relates PatentedOct. 9, 1951 OFFICE BAFFLE STRUCTURE FOR, COMBUSTION TUBETYPE BURNERSJohn I. Conron, Middleboro, Mass.

Application February 24, 1949, Serial No. '78,110

particularly to baiiles for the tops Vof such burners and it has for itsprimary object to improvethe construction and operation of burners ofthe class indicated.

' A further object of the invention is to provide a baflie attachmentunit for application to the top of an existing oil-burner which willenhance the efficiency of the latter; which will be of simple, eicientand inexpensive construction, and which can be applied to anrgexistingoil-burner, preferably withoutrequiring modification of the constructionof the latter.

To these ends I have provided certain improvements in oil-burners andattachments therefor which, in thel preferred embodiment of theinvention, may be constructed and operate as set forth in the followingdescription, the novel features of the invention being particularlypointed out and dened in the claims description. v

'In the accompanying drawings:

Figure 1 is a top plan View of a baie attachment constructed inaccordance with this invention.

Figure 2 is a section on line 2-.-2 of Fig. 1 showing the attachmentapplied to the top of an oilburner.

Figure 3 is a developed sectional detail on line 3-3 of Fig. 1. A

In the accompanying drawings I have embodied my invention in a wellknown type of oil-burner `for use within the firebox of a kitchen rangeor the like, said oil-burner comprising a cast iron base member (notJshown) that is supported by the bottom of the rebox and recessed uponits top side to telescopically receive within it the lower ends of twopairs of upstanding concentrically disposed cylinders I0, I0, and II,II, of perforated sheet metal. Seated within the recessed top of thebase member, as usual, are two annular wicks (not shown) whereof one isdisposed between the lower ends of the two cylinders I0, I0, while theother wick is disposed between the lower ends of the two cylinders II,II, all of said wicks being saturated with fuel oil that isautomatically fed into the recessed top of the base member, as usual, asthe supply therein is consumed by the burner.

As is also usualin this type of burner the base member is provided withair inlet apertures (not shown) through which air is supplied to thelower end of the chamber within the innermost cylinder I I and also tothe annular space between the innermost cylinder I and the outermostcylinder II.

to range oil-burners and Vat the close of the 1 Claim. (Cl. 158-89)Between the two cylinders I0, I0, andfextending from the top of the wickbetween the bottoms thereof to lthe tops of the two cylinders is theusual annular combustion chamber I2 to which air is supplied through theperforations of said cylinders. Likewise, between the two cylinders II,II, and extending from the top of the wick that is between the lowerends thereof to the tops of the cylinders, is the usual annularcombustion chamber I3 to which air is supplied through the perforationsof said cylinders.

The burner is started in operation by means of a lighted taper which isinserted into the upper ends of the combustion chambers I2 and I3 andapplied to the two wicks referred to above. This ignites the oil ofthewicks and shortly all parts of the burner, including the wicks, becomeheated with the result that vaporized oil is liberated from the wicksand ascends the combustion chambers where air isv intermixed therewithto occasion and, support combustion, ,the ames thereof 'and the heatedproducts of combustion discharging upwardly from the upper ends ofthecombustion chambers.

In accordance with my invention I provide a sheet metal cap plate I4that is in the form of a diskof substantially less diameter than that ofthe interior of outermost cylinder I0 and of slightly greater diameterthan that of the exterior of the innermost cylinder I0. This provides anannular outlet I5 for the flames and heated products of combustionissuing from combustion chamber I2. This plate I4 is seated upon thetops of the three innermost cylinders as shown in Fig. 2 and is madewith arcuate apertures I6 which register with the upper end of thecombustion chamber I3 and to serve as outlets for the iames and productsof combustion issuing from within said chamber and also to provideentrances for the lighted taper employed in lighting the innermost wickwhen starting the operation of the burner.

The middle portion of the plate I4 is imperforate and embossed or moldedto provide the bottom side thereof with a circular boss I8 that isslightly smaller in diameter than the inside diameter of the innermostcylinder I I into which it projects to hold the plate' I4 with itscenter approximately at the axis of the burner, and also to provide thetop side of plate I4 with a Circular recess or pocket I9 within whichare seated the lower ends of four legs 20 that are parts of a sheetmetal spider that is fastened at its middle by a rivet 2| to the centerof a circular baie plate 22.

The imperforate middle portion of the cap plate I4 serves as a closurefor the upper end of the interior of the innermost cylinder I I by whichlatter air is supplied to the perforations of the same, while the outermarginal portion of the cap plate I4 closes the upper end of the airsupplying space between the innermost cylinder Ill and the outermostcylinder I I,

The baille plate 22 is made as a disk-like metallic structure having animperforate circular middle portion 23 to which said legs 2) arefastened, said middle portion being surrounded by a circular series ofangularly spaced-apart radial openings 24 which are disposed directlyabove the outlets I and I6 so that the ilames and productsA ofcombustion rising from the two combustion charnbers pass upwardlythrough the same. f

At one side of each aperture 2d the baille plate 22 is provided with anupwardly and obliduely disposed deilector vane 25 by which the productsvof combustion and llames that pass upwardly through the aperture aredeilected laterally thereby imparting a Cyclonic rnotion to the gas andnames after the latter pass through the baille plate. This agitation notonly mixes additional oxygen-laden air with the gases and naines therebyincreasing the combustibility of the unburnt gases but also delays theescape thereof into the oil-take ilue connected with the ilrebox of therange within Which the burner is mounted. This increases the efficiencyof the burner to a substantial extent, economizes in the use of fueloil, and correspondingly reduces the cost of operating the burner.

As herein shown the baille plate is preferably made from sheet metal andall of the vanes 25 with the exception 'of at least one that is shown at25 in Fig. 1, may be punched upwardly from the material of the baille bymeans of a die which simultaneously forms all of the apertures 24, sothat each Vane 25 is an integral extension of said body portion whichextends obliquely upwardly from said body portion and tangentiallyrelatively to the center thereof, with all of the vanes 25 facingcircumferentially, so to speak, in one direction in order to obtain thecyclorn'c effect referred to above. Y

The single vane 25 is originally produced as a separate unit at one sideof which are provided two integral hinge tangs 26, 26, that looselyoccupy holes 2l, 21, formed in the body portion of the baille 22. At theopposite side of the vane 25 is provided an integral leg tang 28 Whoseextremity rests upon the top of the baille and supports said vane 25 inits oblique position. When starting the operation of the burner vane 25is swung upwardly on the hinge tangs 26 into an open position thereby topermit the lighted taper referred to above to be passed downwardlythrough the passageways I5 and I6 to light the wicks after which thevane is returned to its normal oblique position with tang 28 restingupon the top of the baille.

What I claim is:

In a device of the class described, the combination of a cap plate toseat upon the tops of the cylinders of a range oil burner and made 'witha circular series of apertures adapted to be disposed at the top ofV oneof the combustion chambers of the burner to serve as outlets for saidchamber, the middle portion of said cap plate being irnperforate andformed upon its top side with a circular recess; a baille plateabovesaid cap plate provided with depending legs resting `within saidrecess and supporting said baille plate above and spaced away from saidcap plate, said baille plate having a circular imperforate middleportion surr rounded by a circular series of angularly -spaced apartradial openings adapted to occupy positions directly above the cylindersof the burner and each of which openings is provided with an obliquelydisposed deector vane by which the products of combustion issuingupwardly through its opening are deilected laterally, one Yof said vanesbeing hingedly connected with said baille plate so that it can beadjusted into an out-ofthe-way position permitting a lighted taper to bepassed through its opening to ignite a wick of the burner; all of saidvanes except said hinged vane being integral stamped out portions ofsaid baille plate, and all of said openings being surrounded by anmperforate continuous peripheral portion of said baille plate.

JOHN J. CONRON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Date

